Please help identify this handgun

I'm brand new to this forum and I' know nothing about guns. However, my father, who is not web savvy, found this old revolver and planned on reconditioning it for a fun project, but wanted to make sure it wasn't some sort of valuable antique before he started messing with it.

Can anyone tell me what it is? Should he just have fun with it, or might there be some value in it?

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Out of the Czech Republic

Excellent choice for a project gun. Only downside is that if you do get it
all spiffed up, ammo is probably not available. Hmmmmm---anybody ever
seen an old pinfire converted to say--22LR? Now THERE would be a
project!